import { isArray, isDate, isObject, isSymbol } from './is';

function looseCompareArrays(a: any[], b: any[]) {
  if (a.length !== b.length) return false;
  let equal = true;
  for (let i = 0; equal && i < a.length; i++) {
    equal = looseEqual(a[i], b[i]);
  }
  return equal;
}

export function looseEqual(a: any, b: any): boolean {
  if (a === b) return true;

  let aValidType = isDate(a);
  let bValidType = isDate(b);
  if (aValidType || bValidType)
    return aValidType && bValidType ? a.getTime() === b.getTime() : false;
  aValidType = isSymbol(a);
  bValidType = isSymbol(b);
  if (aValidType || bValidType) return a === b;
  aValidType = isArray(a);
  bValidType = isArray(b);
  if (aValidType || bValidType)
    return aValidType && bValidType ? looseCompareArrays(a, b) : false;

  aValidType = isObject(a);
  bValidType = isObject(b);
  if (aValidType || bValidType) {
    /* istanbul ignore if: this if will probably never be called */
    if (!aValidType || !bValidType) return false;
    const aKeysCount = Object.keys(a).length;
    const bKeysCount = Object.keys(b).length;
    if (aKeysCount !== bKeysCount) return false;
    for (const key in a) {
      const aHasKey = Object.prototype.hasOwnProperty.call(a, key);
      const bHasKey = Object.prototype.hasOwnProperty.call(b, key);
      if (
        (aHasKey && !bHasKey) ||
        (!aHasKey && bHasKey) ||
        !looseEqual(a[key], b[key])
      ) {
        return false;
      }
    }
  }
  return String(a) === String(b);
}

export function looseIndexOf(arr: any[], val: any): number {
  return arr.findIndex((item) => looseEqual(item, val));
}
